Prime Factorizations

Post Test

1. Prime Numbers are

a. All numbers less than 100
b. Numbers which are a product of 1 and the number with no other products
c. Even numbers except for 2
d. Numbers which contain a decimal

 

2. 1,2,3,5,7 are examples of-

a. Odd numbers counting by twos
b. Even number counting by twos
c. The prime numbers which are less than 10
d. All of these

 

3. Prime Factorization is when you

a. Represent a number by it's factors
b. Represent a number by it's elements
c. Represent a number by it's factors which are all prime numbers.
d. Use all even numbers to factor a larger number

 

4. 2 X 2 X 2 X 2 X 6 will be easier to write and understand when written as

a. Factors
b. Exponents
c. Squares
d. Cubes

 

5. Written exponentially, 2 X 2 X 2 X 2 X 5 would be-

a. 2 X 2 X 5
b. 52 X 2
c. 24 X 5
d. 8 X 5

 

6. Which of these is not a prime Number-

a. 1
b. 2
c. 3
d. 4
e. 5

7. Consider this factorization of the number 12. Which number is best for the question mark space?

a. 1
b. 2
c. 4
d. 6

 

8. Consider this factorization of 45. What is wrong with it?

a. The math is not correct
b. Not all of the numbers in the bottom row are prime numbers
c. Nothing is wrong.

9. Consider this factorization. What is wrong with it?

a. The Math is not correct
b. Not all of the numbers in the bottom row are prime numbers
c. Nothing is wrong

 

10. If a number ends in zero, it is divisible by

a. 2
b. 5
c. 10
d. all of these

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